OCR Text |
Show ( - 6 - a) the furn.ce de.ign .o41ficationa undertaken to moderniEe and to .ignific. ntly i~rove the co~uation capability and control of the incin.r.tor (di.cu •• ed previously). b) the -real ti.- data reduction in the field. c) the overall .cope and extent of .a~le ~~ollection and analy.e •• Of .iCJDificant illlpOrtance to the Quebec City program, va. the extenaive a.,unt of te.t data available on the old furnace eSe.ign. The Cog inciner.tor ba. been the .ubject of acceptance te.ting, -annual te.ting for particulates, particulate .iEing char.cteriEation, and te.ting for BCl and _tal. emi •• ion8, as vell a. dioxin and furan elli •• iona, all a. part of a provinci.l ...... .ent program and previous NITEP te.ting at thi. facility. All thi. infor.ation ba. provided .n excellent reference to the compari.on and a •• e88I11!Dt of the improvement. _de to the furnace de.ign. PRELIMINARY PINDINGS In 1984, BnvirOllllent Quebec undertook an ••••••• nt of the dioxin and furan eai •• iema froa the Quebec urban CoDllllWlity inciner.tor plant. Thr •• te.t. v.re co~leted, which indicated relatively bigh cODcentrat1oDa of dioxin. and furana, vhich i. not unco-.,n for f.ciliti .. of this v1lltage. However, after i~le.aDting the .odific.tiona •• previoualy di.cua •• d, a .ignificant reduction in dioxin emi •• iona va. ob •• rved (.ee figure 6). By Ulploying good operatiDg pr.ctice. a. defined in ~rn incinerator faciliti .. , dioxin concentratioDS were reduced betv.en 40 and 100 ti_ below the 1984 te.t re.ult.. Furthermore, under poor operating pr.ctic .. , the reduction achieved vas an order of -gni tude. Thi. 8Ugge.t. that the new de.ign bad a .ignificant influence on dioxin eai •• ioDa, however, good operating practice va. al.o e ... ntial to IllnimEe dioxin for_tion and eld. •• ion. Another intere.ting finding vas the large r.duction in particulate e ••• iona between the old and neW furnace de.ign.. In figw:e 7, the particulate cancentr.tiolUl at the .tack are cOllpllred between the old and nev de.igna at 28 and 32 tonne./hr. .team flow. On the average, reductiolUl in exce.. of 20 ti... were achiev.d vith the new de.ign concept at both of the.e .t... rate.. The degree of reduction in both dioxina and particulate va. approxi_tely the .a_ which .ugge.t. a poe.1ble 1Ilterrelationahip. Baaed Oft current theory that diaxina are .,.tly bcund to particulate. in the combustion ga.es, it i. postulated that good cOGlbuation condition. that reduce the carryover- of particulates from the furnace, vill also 1I1n1I11Ee the for. .t ion and emi.sion of dioxins into the envir~nt.• The afore.entioned findings are but a fev that vere observed fro. the test re8ult.. At the time thi. paper vas prepared, -not all the analytical re.ult. were available. Consequently, the correlation on .uch of the data could not be colilpleted. Thi. infor_tion, a. well a. other .ignificant findings, vill be given during the conference pre.entation. A comprehensive .eries of report. on the _.s-burn te.t program vill be publiahed - daring the fall of 1987. |